Machine-tool.



s. HJK EEFER & G. E. GREENLEAF. M. A. KEEFER, ADMINISTRATRIX OF S- H.KEEPER, DECD.

MACHINE TOOL. APPLICATION FHLED MAY 26, m3. RENEWED APR. 15, 19:8.

Patented Apr. 1, 1919.

0 SHEETS-SHEET l- S. H. KEEFER & 6. E2 GREENLEAF. M. A. KEEFER,ADMINISTRATRIX OF. S. H. KEEFER, DECD. MACHkNE TOQL. APPLICATION FILEDMAY 26, 1913. RENEWED APR. I5.J9l8- Patented Apr; 1, 1919.

1,2 10 SHEETS-SHEET 2 WITNESSES:

H. KEEPER & G.YE. GREENLEAF. M. A. KEEFER, ADMINISTBATRIX 0F s. H.KEEFER, 05cm.

MACHINE TOOL- APPLICATION FILED MAY26,1913- RENEWED APR. 15,1918.

10-'SHEETSSHEET 3.

PatentedApr. 1, 1919;

S. H. KEEFER & G. E. GR'EENLEAF. M. A. KEEFER, ADMINISTRATRIX orSLHLKEEFER, own.

MACHINE TOOL. APPLlCATlON'HLiD MAY 26. I913- RENE,WE D APR- 15,1918.

Patented Apr. 1,1919.

l0 SHEETS-SHEET 4.

jmmmmg S. H. KEEFER & G..E.'GREENLEAF. M- A- KEEFER, ADMINISTRATRIX OFS. H. KEEFE R, DECD MACHINE TOOL.

APPLICATION FILED MAY 26. l9l3- RENEWED APR. l5. l9l8- Patented Apr. 1,1919.

m l0 SHEETS-SHEET 5- S. H. KEEFER & G. E. GREENL'EAT M. A. KEEPER.ADMINISTRATRIX 0F s. ii. KEEFER. 05c...

MACHINE TOOL. APPLICAT ION FILED MAY 26. 1913. RENEWED APR. 15.1918.

Patented Apr. 1,1919.

l0 SHEETS-SHEET 6.

WIN/8858:

S. H. KEEPER & G.. E. GREENLEAF. m. A. KEEPER. wmms mnmxor s. u. KEEEER.usc'n.

MACHINE TOOL. APPLICATION FILED MAY 26.. L913: RENEWED APR. 15, 1918.

1 ,299, 1 92. Patented Apr. 1, 1919.

I 10 SHEETS-SHEET I.

INVENTUR at- $4, a

' ATTONEYB s. H. KE EFER & G. E. GREEN LEAF M. A. KEEPER, ADMIMSTRATRIXOF S. H- KEEFER. DEC'D.-

MACHINE TOOL.

APPLICATION FILED MAY 26. 1913. neuswcn APR. 15.1912.

- Patented Apr. 1, 1919.

10 SHEETSSHEET 8.

WITNESSES:

m M 0 n S. H. KEEFER (Q G. E. GREENLEAF. M. A KEEPER. ADMINISTRATRIX OFS. H. KEEPER. DEC'D.

MACHINE MAY 261l9\3- RENEWED APR. 15. IQIB.

TOOb

1,299 1 91:2.APPLICATION FILED Patented Apr. 1,1919.

10 SHEETS-SHEET 9- WITNESSES ATTORNEYS S. H. KEEPER & G. E. GREENLEAF..fvl. A. KEEPER, ADMINISTRATRIX OF S. H. KEEFER, DECWKI. MACHINE TOOL.APPLICATION FILED MAY 26, I813. RENEWED APR. 15.1918- 1,299,192.;Patented Apr. 1,1919.

I0 SHEETSSHEET10- vention, as concerns SAMUEL H. KEEFER, DECEASED, LATEOE PLAINFIELD, NEW JERSEY, BY MAE A.

KEEFER, ADMINISTRATRIX, 0F PLAINFIELD, NEW JERSEY, AND GEORGE E.GREENLEAF, OF PLAIN FIELD, NEW JERSEY, ASSIGNORS TO NILES-BEMENT- PONDCOMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

MACHINE-TO 0L.

Application filed May 26, 1913, Serial No. 769,859. Renewed April 15,1918.

.the work is secured, and with one or more cutting tools adapted to befed transversely of the lines of travel of the table and of work. Theinvention is particularly adapted for use in connection with a machinehaving a vertically adjustable horizontal cross rail which is supportedabove the moving table,

and having one or more tool-carrying heads horizontally adjustable onthe cross-rail. We have illustrated and will describe a planer as anexample of a machine of this class, but it will be understood that theincertain phases thereof, is not limited to planers.

One of the objects of the invention is to provide an' improvedarrangement of parts whereby a single poweraneans, preferably anelectric motor, may be utilized either to move the cutting toolcontinuously for preliminary adplstments or intermittently for feeding.Another object of the inventlon is to provide improved means whereby theelectric feed-motor may be automatically stopped after-moving the toolto a predetermined extent, and means whereby the stopping means may berendered inoperative to prevent continuousmovement of the tool. Afurther object of the invention is to provide improved electricaldevices for controlllng not only the feed-motor but motor which may bethe movable table.

Other objects will be apparent from the followingspecification andclaims.

The invention accordinglyconsists in the features of construction,combinations of elements and arrangement of parts which will beexemplified in the construction hereinafter set forth, and the scope ofthe applicaalso another provided for driving Specification of LettersPatent.

Jersey,

the

Patented Apr. 1, 1919.

Serial No. 228,809.

tion of which will be indicated inthe fol lowing claims.

Referring now to the accompanying d awings, in which are shown one ofvarious possible embodiments of the several features of the invention,

Figure l is a view in elevation of what may be termed for conveniencethe right side of a planer constructed in accordance with the presentinvention;

Fig. 2 is a. front end elevation on a larger scale, parts of the toolheads being omitted for the sake of clearness;

Fig. 3 is a fragmentary left side elevation on a still larger scale;

Fig. 4 is an enlarged front elevation of the feed-motor and parts of thegearing connected therewith;

ig. 5 is a plan view of the partsshown in Fig. 11 is an enlargedelevational view of the clutch shown in sectlon in Fig. 10;

Fig. 12 is a fragmentary rear elevation partly in section of thecross-rail and one of the cross heads supported thereon;

Fig. 13 is a vertical sectional view taken along the lines 13l3 of Figs.2 and 12;

Fig. 14 is a' fragmentary plan View with certain parts shown in sectionalong the line 1414 of. Fig. 10;

Fig. 15 is a fragmentary vertical sectional view taken along theline1515 of Fig. 14;

Fig. 16 is a diagram of the electrical connections.

Similar reference characters refer to similar parts throughout theseveral views of the drawings. a

Referring now more particularly to Figs. 1. and 2, there is shown aplaner comprising a bed 1, a table 2, mounted thereon and ably themotoris directly and positively connected with the table, and means areprovided for reversing the motor periodically to effect thereciprocation of the table. The work which is to be planed is secured tothe table 2 in the usual manner, and as the table reciprocates on thebed 1, the work is thereby carried past one or more relativelystationary tools mounted, respectively, on crossrail heads at, 5 and onside-heads 6, 7. The

- several tool carrying heads 4, 5, 6 and 7 are adjustable and suitablemechanism is provided for adjusting them either independently or inunison, as may be required. The tool heads must be preliminarilyadjusted to bring the tools into operative relationship with the work;and, during normal operation, immediately after-or immediately priorto'each cutting stroke the four tools, or a lesser'number if four ar notbeing used at the time, are fed suitable distances equal to the widthsof the cuts which have been found most advantageous for the particularwork in hand. Thus, the normal operation of the planer requires meansfor starting and. stop- 3o ping the mainmotor and for reversing the sameat the end of each stroke of the table, "as Well as for feeding eachone'of the tools between one cutting stroke and the next. The adjustingof the tools is accomplished,

v by a suitable power means or motor which is preferably electricallyoperated orcon trolled! As illustrated,'there is a single electric tooladjusting motor 8 mounted, preferably, on the stationary arch 9 of theplaner and so connected electrically with the control apparatus as to berotated a predete'rmined number of revolutions between one cuttingstroke and the next. functions of the motor relating to the adj netmentsof the various. tool-holding elements prior to the utting operation willbeherevinafter described in detail.

. Considering now the electrical features of I the apparatus, wherebythe automatic reciprocation' of the table and the feeding of the toolsare accomplished, there is shown in Fig. l a main electromagneticcontrolling mechanismlO. This mechanism comprises three switchingdevices 11, 12 and 13, and two relatively ,fixed blow-out magnets 14 and15 placed respectively between. the switching deiices. There is alsoprovided a double-pole double-throw transfer switch 16, a fuse box orother safety device 17 andanauxiliary {so/switching device 18. Inaddition there is'a feed-motor cut-out device 19, shown naost clearly inFig. 3, and a table operated controlling device in the fornigf, apilot-switch shown in the diagrainmatlc Fig. 16. This switch is adaptedtobe operated by'levers 21,

The additional 22, which are thrown either manually, as in thepreliminary adjustments, or by adjustable dogs 23, 24 on the planertable, as in normal operation. The electrical connec-' tions between thetwo motors and the several elements of the control apparatus are shownin Fig; 16 and need not be separately enumerated in detail, as it isbelieved that a rsum of the sequence-of operations will make the matterclear.

The pilot-switch 20 may have any one of several forms, but it ispreferably composed of a rotatable drum-21 provided with two elongatedand relatively insulated bars 22, 23'. Associated with the drum 21 andarranged concentrically therewith are six fixed contacts 24:, 25, 26,27, 28 and 29. When the drum 21 is in its neutral or oil po sition, asshown in Fig. 16, the contact bars 22' and 23 are out of engagement withall of these fixed contacts. \Vhcn, however, the drum 21 is rotated toits cutting position, either manually or by the engagement of the dog 24with the lever 22, the bar 22 shortcircuits the two cutting contacts24', 25,

while the bar 23 short-c1rcuits the two middle contacts 26, 27. It isassumed at this 1 time that the main and feed motors are bothstationary, that power from 'an external source is available at asuitable constant volt age across the terminals marked respectively andand that the double-pole, doublethrow swi'tch16 is thrown upward. 'Now,with the pilot-switch in its cutting posit-ion, as above indicated,current will flow from the positive main at 30 to the lower contact 31of the middle movable-core switching device I 12, thence through theshunt field 32 of the main 1notor'3 to the negative main 33, thisgiving, as will be obvious, a maximum energizationof the field magnetsof the main motor. At the same timecurrent flows from the positive mainat 30, through the lowered movable contact 34.1'nside the stationarycore of the right-hand blowout magnet 15, thence through the coil. 35 ofthe first switchingdevice 11, throughthe contact 25, bar 22 and contact24 of the pilot-switch to the negative main 33. The core 36 of the firstswitching device 11 at once rises, thereby completing a circuit from thepositive main 30 through the coil 37 of the left blowout magnet 14-,through the lower auxiliary contact 38 of the third switch 13, thencethrough the core 39 of the said third switch,

. through the left blade of, the double-pole double-throw switch 16,armature 40 of the main motor 3, main interpole 41 and extra interpole42 of said motor, armature resistance 13, through the core 36 of thefirst switch 11 to the negative main 33. This comparatively weak currentthrough the armature of the main motor, in conjunction with the stronglyenergized shunt field thereof, causes the motor to start in a directioncorresponding to the cutting stroke of the planer table. As soon as thespeeding up of the motor causes the voltage drop across its armature,interpoles and starting resistance to rise sufiiciently, the winding 44of the second switch 12, which is in shunt therewith, is sufiicientlyenergized to lift the core of this second switch, therebyshort-circuiting at 46, 47, the starting resistance 43 and extrainterpole 42 of the main motor. At the same time, by breaking theconnection between the positive main and the lower movable contact 31 ofsaid second switch, the switch 12, inserts into the shunt field circuitthe desired portion of the cutting resistance 48 by virtue of the closedcircuit from the ositive main, at 30,. through the coil 37 of tiie'leftblow-out magnet 14, lower auxil: iary contact 38 of the third switch 13,lower fixed contact 49 of said third switch 13, through a portion of thecutting resistance 48 to the positive side of the shunt field 32 of themain motor. It will be obvious without further explanation that thisresults in a speeding up of the mainmotor, due both to the weakeningof'its shunt field and to the short-circuiting of its armatureresistance. The main motor connections remain as indi cated until thepilot-switch is rotated from its cutting 'position to its returnposit-ion,

either manually or by the engagement of the dog 23 with the lever 21.This breaks the circuitacross the cutting contacts 24, 25 of thepilot-switch as well as across the middle contacts 26, 27, and almostinstantaneously thereafter short-circuits the return contacts 28, 29,and reestablishes the connection between the middle contacts 26, 27.

During the rotation of the pilot-switch drum, however, the first andsecond switches 11, 12 drop their cores, thereby once more connectingtheshunt field directly across the mains and causing the dynamic braking ofthe main motor by virtue of the closed circuit, including the armature40, main interpole 41, extra interpole 42, starting resistance 43, core36 of the first switch 11., lower auxiliary contact thereof, coil 51 ofthe Iight-hand blow-out magnet'15, coil 37 of the left-hand blow-outmagnet 14, lower auxiliarycontact 38 of the third switch 13, core 39thereof, thence through the left blade of t double-pole double-throwswitch 16 to the opposite terminal of the armature 40. The blow-outmagnets 14, 15 when sufiicientlyenergized, draw up within them the lowermovable contacts 52, 34, respectively, which open-circuit the coils ofboth the first switch 11 and the third switch 13, so that, even thoughthe drum of the pilot-switch has attained its return position, the thirdswitch 13 is not energized until the motor armature has practicallystopped rotating. hen this occurs the core 39 of the third switch 13rises, thereby causing the main motor to start with the startingresistance 43 in the armature circuit and with the current through thearmature in the reverse direction, so that the direction of movement ofthe planer table corresponds to its return stroke. As in the cuttingstroke, the core of the second switch 12 rises as soon as the armaturevoltage has risen sufficiently, and as before, the rising of this coreshort-circuits the starting resistance 43 and weakens the shunt field;the circuit through the shunt field, however, is not now through thecutting resistance 48, but may be traced from the positive main at 30,through the coil 51 of the right-hand blow-out magnet 15, lowerauxiliary contact 50 of the first switch 11, lower fixed contact 53thereof, return resistance 54, shunt field 32, to the negative main 33.This enables the shunt field current to be maintained at a suitablevalue, weaker, however, on the return stroke, so that this stroke maybemade at an appropriately higher speed than the cutting stroke.

So far no mention has been made of the operation of the feed motor 8,but it will be noted from Fig. 16 that the shunt field 5 5 of this motoris at all times energized by current from the mains 30 and 33, and thatwith the double-pole double-throw switch 16 in its upper or runningposition and the movable member56 of the feed motor cutout 19. in such aposition as to connect the lower fixed contacts 57, 58 thereof, currentwill flow from the positive main 30 through the coil 59 of the auxiliarycont-roller 18, through the right-hand blade of the doublepoledouble-throw switch 16, contact 57, movable member 56 and contact 58 ofthe feed-motor cut-but 19, the contact 25, bar 22- and contact'24 of thepilot-switch (assuming the pilot-switch in its cutting position), to thenegative main 33. The rising of the core 60, of the auxiliary controller18 resulting from this cnergization of the coil 59 completes a circuitfrom the positive main 30, through the coil 37 of the lefthand blow-outmagnet 14, lower auxiliary I 'contact 38 of the 'third switch 13, core39 thereof, upper contact 61 of the auxiliary controller, core onthereof, to the right-hand brush of the feed-motor armature 62, thencethrough the armature to the left-hand brush, coil 63 of the blow-outmagnet 64 of the auxiliary controller, core 36 of the first switch 11,to the negative main at 33. As a result the feed motor starts to rotateand continues its rotation until it has caused the vertical shaft 65 ofthe planer (see Fig. 3) to rotate through a. definite predeterm-inedangle which is preferably one-half a revolution. Thereupon the cam (56fixed on this shaft shifts the movable member 56 of the feed-motorcut-out 19 from its lower position, indicated in Fig. '16, to its upperposition, where it connects the upper fixed contacts 67 68'. Asthisshifting of the out out device open-circuits the coil 59 of the auxiliar7 controller 18, the core 60 thereof drops, thereby disconnectingthearmature 62 from the source of power and short-cir- The feed-motor isnot again. rotated until the drum 21 ofthe pilot switch 20 has beenshifted toits return position, whichoccurs, aspreviously stated, at theend of the'cutting-stroke. At this time the coil 59-01 the auxiliarycontroller is energized by current passing through it from the positivemain 30, through the right-hand ,blade of the double-pole ClOUblG'tl'HOWswitch 16, upper.

contact 67, movable member 56, and upper contact 68 of the feed-motorcut-out 19, contact 28, bar 23, and. contact 29 of the pilot switch 20,to the negative main. This, as be fore, connects the core 60 of theauxiliary controller to the upper contact 61 thereof and completes acircuit through the armature 62 of the feed motor, but it Will benoticed that the current through the armature flows in the oppositedirection, thus causing the rotation of the feed motorin the oppositedirection. As in the case of the cutting stroke, the cut-out 19 effectsthe dynamic braking of the feed-motor after the vertical shaft 65 driventhereby has rotated through a definite predetermined angle, preferablyone-half a revolution.

' It will be noted that the construction is such that the starting ofthe feed-motor is effected by the same switches Hand 13 which also startthe main motor. Asalready stated, the energization of the switches 11and 13 is dependent upon the closing of the switches 84 and 52 Which areheld open so long as any considerable current flows in the short circuitof the main motor. In this Way the feed motor isprevented from startinguntil the speed of the main motor drops to a predetermined point, theoperation of the feed-motor being thus dependent upon the speed of themain motor.

The above comprises an outline of the sequence of events occurringduring the'normal operation of the planer. Now, in order that thefeed-motor 8 may be used for making one or more of the adjustmentsusually necessary prior to the actual cutting operation, the double-poledouble-throw switch 16 is shifted to its lower. position as in Fig. 1.As will be obvious from an inspection of the wiringdiagram. in Fig. 16.this open-circuits completely the armature of the main motor.andconnects the coil 59 of the auxiliary controller permanentlyacrossthe mains, so

that With the pilot-switch drum in either its cutting or returnposition, the feed-motor Will now run indefinitely in one direction orthe other, its field, as duringthe normal operation of the planer, beingpermanently connected across the'mains. r p

The preliminary adjustments, then, are conveniently accomplished bykeeping the double-pole double-throw transfer switch 16 in its lowerposition and shifting the drum 21, of the pilot-switchto and from itsout ting, neutral and return positions by operating manually one or theother of thelevers pendent manual control is effected by the same switch7 mechanism which normally serves to control the main motor, and in thisWay it is possible to make use of a single controlling mechanism toeffect the con trol of both motors. When the tool adjust ing motor isadapted to effect the normal feeding; movements of the tools, thetransfer switch serves in one position to place the main motor under thecontrol of the controlling mechanism and to connect the feed-motor forautomatic operation; and it serves when in its other position to'placethe feedmotor alone under the control of the controlling mechanism.Preferably, as illustrated, the feed-1notor is also under the control ofthe controlling mechanism when the transfer switch is in its first,position, but as to this there can be variation. A

Certain of the electrical features above notedare'the invention ofWillard T. Sears in collaboration with Samuel H. Keefer,

one of the present inventors, as set forth in their Patent No. 996,529,granted June 2?,

1911, reissued May 1st, 1917, Reissue No. 14.296.

. Taking up the mechanical featur s of the invention for detailedconsideration, it will be noted that the power means or motor forfeeding the tools is shown as suitably mounted on the stationary arch 9of the. planer with the shaft 69 of the motor arranged horizontally,transverse to the plane of reciprocation of the table 2. The vertical.shaft 6? hcreinbeforedescribed as causing the operation of the cam 66oftho fecd motor cut-out 1 and a counterpart 70 of this shaft on theother side of the planer are rotated directly from the n.otor shaft- 6through worm and wheel connections 71, 72. so that whenever theteed-motor is rotating. both vertical shafts (3."). 70. are in motion.

Neglecting" for the m ment the arious i ment ofthe inventionillustrated, this inde devices actuated by the rotation of thesevertical shafts 65, 70, there is shown at 73 a pinion loosel-y mountedon the motor-shaft 69. The pinion 73 is connected preferably through anidler 71 to a gear 75 on a horizontal shaft 76 parallel to the shaft(39. By means of bevel gearing at 77 and 78 the shaft 76 drives verticalelevating screws-79 and 80. These screws support the cross-rail 81 andwhen the screws are turned the crossrail is raised or lowered. lVhensuch adjustment of the cross-rail is to be made, the pinion 73 isopcratively connected with the feed-motor shaft 09 by means of a toothedclutch 82 comprising asplined tooth collar E7. This collar is providedat 91 with an annular groove into'which extends oppositely disposed pinson a forked yoke 92. ,The .yoke is carried by a lever 89 pivoted at 90.By means of a link '86 the lever 89 is connected with a lever 81 whichis provided at its lower end with a handle 83 and which is adapted to befastened by means of a suitable latch device at 85. To connect thepinion 7 with the shaft G-Q'the operator nulls outward on the handle8-3, thus moving the clutch collar 87 toward the right as viewed inFigs. 1; 5 and 6 and engaging the teeth thereof with similar teethformed on the hub of the pinion. When the crossrail is to be raised orlowered, the transfer switch 16 is thrown to its lower position and theclutch 82 is engaged by pulling the handle 83 upward. The operator thenoperates the motor 8 in one direction or the other to raise or lower therail, this operation in the present case being effected by manuallymoving the levers 21 and 22.v

hen the cross-rail has been moved to its proper vertical position thehandle 83 is again latched to the frame of'the planer so that 'furtherrotation of the feed-motor 8 will have no effect upon the elevatingscrews 79, 80 of the cross-rail. 5

N ow that the cross-rail has been adjusted, the feed motor 8 is used toeffect the power traverse of the two cross-rail heads 4 and 5through'mechanism locatedat one side or the other of the cross-rail andmovable therewith, a. preferred form of this mechanism being constructedas follows:

Splined to the vertical shaft driven as above noted from the feed-motorshaft 69 through the worm gearing 72 is a horizontal bevel gear 03meshing with a vertical Level gear 94 having preferably the same numberof teeth. 'The gear 91 is keyed to a horizontal intermediate shaft 05carrying two power transmitting devices, namely, a gear 06 used in thepreliminary ad ustments of the planer and a feed plate or crank arm I 97used to advance the cross-rail heads the desired amount during each ofthe cycles of cutting operations.

Considering-now simply the, preliminary I adjustments of thecross-railheads, it is prefgear through a clutch device 100 causes thecontinuous rotation of a large drive gear 101. By means of doubleratchet gears 102,103 and horizontal screw-threaded shafts 104, 105transverse movements of the respective crossrail heads 4, 5 are caused.The clutch device 100, which is shown in detail in Figs. 10 and 11,comprises in the present instance a clutch collar 107 splincd at 110 ina central recess in the hub of the gear 101. This clutch collar has atone end teeth 109 adapted to. mesh with similar teeth 106 on the gear98, and at the other end the collar has teeth 108 adapted to mesh withsimilar teeth 202 on the hub 201 of-a lever 200, which will be againreferred to. The clutch collar 107 is movable axially by means of ahandle 111 which is secured to a rod 112 slidable in a central aperturein the stud 99. The rod 112 carries a transverse pin 113 which extendsthrough slots 11% and 115 in the stud and the ends of which project intoan annular space 116 in the clutch colteeth 109at the right hand side ofthis dog 107, it will be obvious that a movement in; ward (to the rightin Figs. 10 and 11) of the handle 111 will cause the teeth 109 on thecollar 107 to mesh with the teeth on the gear 08 so that with the clutch100 in this position the continuous rotation of the feed motor 8 willcause, throu h the gears 96 and 98, thcclutch 100 and the large gear101, the continuous rotation of the double-ratchet gears 102, 103. Thesegears, which are substantially identical, comprise each an annularmember 117 (Figs; 8 and 0) provided on its outer surface with teeth 118adapted'to engage continuously the teeth 119 of the large gear 101 andon a'portion or all of its inner face with notches forming twooppositely disposed ralchets 120, 121. Mounted concentrically withinthis annular member 117 is a second member 122 prevented from oted at127 and adapted to be rotated a portion of a revolution one way or theother. from its neutral position (shown in Figs. 7 and 9) so as to causeone end or the other of said pawl to engage one or the other of the twooppositely extending 'sets of ratchet teeth 120, 121 of the annularmember 117. From this it will be clear that if say the right-hand end(Figs. 7 and 9) of thepawl of said shaft, the right-hand end of the pawlat this time slipping idly over both sets of ratchet teeth 120, 121. Ina similar manner the squared shaft may be given a clockwise rotationwhile the annular member rotates clockwise and no rotation at all whenthe latter is moving in the opposite direction. The pawl is oscillatedby means of a handle 128 fixed to or integral with the pawl 126, and ispreferably held in either of its three positions by means of a latchcomprising the leaf spring '129 secured as at 130 to they second member122 and notched and beveled as at 131,132, to cooperate with a suitablyshaped member 133 movable with the pawl 126.

A suitable nut 134 secured to the left-hand cross-rail head 4 serves totransmit the rotary motion of the upper traverse screw 104 to thecross-rail head 4, and a nut 135 is provided on the right-hand head 5 totransmit motion from the lower traverse screw 105 to said head. Fromthis it will be clear that by slipping a click box on the squared end ofthe traverse screw 104 for the left cross-rail head 4 the continuousrotation of the feed-motor 8 in one direction may be made to effect themovement to the left of the left cross-rail head, or the rotation'of thefeed-motor in the opposite direction may be utilized for moving thecross-rail head to the right, or the latch of'the click box may bemanipulated in such a way that the cross-rail head is not moved at all.A second click box if slipped onto the squared end of the other traversescrew 105 serves to move the right-hand crossrail head 5 to the left orright as. may be necessary, to adjust the tool carried thereby, and itwill be clear, furthermore, that while the feed-motor is rotating in onedirection both cross-rail heads may be moved to the right, for instance,or one or both may be stationary, and likewise with a reverse rotationof the feed-motor both cross-rail heads not cause the movement of eithercross-rail head. The tool heads 4 and 5 are provided respectively withangularly movable-swivel plates 4 and 5 on which are respectivelymounted slides 136 and 137. These slides carrythe cutting tools as shownin Fig. '1 and are normally movable vertically, but it will beunderstood that the direction of movement can be adjusted angularly-byturning the respective swivel plates 4 and 5 For effecting verticalmovement of each slide there is provided a suitable mechanism such as isshown in detail in Figs. 12 and 13. There is. provided a-horizontalshaft 138 rotatably mounted on the cross-rail and positionedapproximately midway between the screws 104 and 105. For each cross headthe horizontal shaft 138 has splined upon it a sleeve 139 which carriesa bevel gear 140.

This bevel gear meshes with a second bevel gear 141 secured to ahorizontal shaft 144 which is rotatably mounted in the body part of thecross head with itsaxis coincident with the axis of movement of thecorresponding swivel plate. The sleeves 139 are longitudinally slidablerespectively in brack ets carried respectively by the cross head, andare longitudinally movable in the brackets under the controlrespectively of bellcrank levers 142 and 150 pivoted to the respectivecross heads as indicated at 143. By means of these lovers the sleevescan be moved to bring the respective gears 140 into which meshes with asimilar bevelgear 145 secured to the aforesaid shaft 144.

When the shaft 138 is turned, motion may be transmittedv to either orboth of the threaded rods 147 and these rods, because of theirengagement with the nuts 147, will serve respectively to raise orlowerthe slides 1.36 and 137 and the tools carried thereby. Inasmuch as eachshaft 144 is mounted concentrically with the axis of movement of thecorresponding swivel plate, the slide can be adjusted to any anglewithout disturbing the power connection.

When one or the other of the slides is to be moved by power, it isconnected with the shaft 138 by moving the proper lever 142 or 150 andby putting a click-box in place on the end of the shaft, This cliclcboxengages :the aforesaid gear wheel 101 and may be adjusted to turn theshaft 138 in either direction.

If the planer is equipped with one or more side heads such as thoseindicated at 6, 7, the

feed-motor 8 may be utilized to raise or" lower either of themindependently of the other so that they will be in the proper p081- tionto have their respective tools operate turning thefshaft 165 either A?.9 1.2 on the work as soon as thetable 2 is reciprocated by the mainmotor 3. To this end there is provided on each side head a mechanismsomewhat smaller but otherwise similar to that used for the cross-railheads. Each mechanism comprises a bevel gear 157 splined tothecorresponding vertical shaft or 70. Arranged in permanent drivingengagement with the gear 157 is a bevel gear 158 keyed to a horizontalintermediate shaft 159 which carries two devices, namely, a gear 160 anda feed-plate or crank arm 161. Either the gear 160 or the feed-plate 161may be used to rotate a large gear 162 according to the position of alongitudinally movableelutch controllable by a handle 163. Theclutch isplaced in its inner position to connect the shaft with the gear 160 whenit is desired to rotate the gear 162 continuously, as is desirable foreffecting preliminary adjustment. The clutch is placed in its outerposition to connect the feed-plate 161 with the shaft when it is,desired to oscillate the gear 162. This large gear 162 drives theannular member of a double-ratchet, gear 164 similar in every respect tothose driven by the large gear 101 of the mechanism attached to thecross-rail. The double-ratchet gear 164c is remvably mounted onthesquared end of a horizontal shaft 165. Secured to the shaft 165 is abevel gear 160 which meshes with a bevel gear 167 on a short verticalshaft 169. Connected with the gear 167 is a spur gear 168 which mesheswith an idler spur gear 170, this idler gear in turn meshing with a spurgear 171 splined on a vertical threaded shaft 172. I This shaft hasthreaded engagement with a part of the body'of the side-head whichserves as a nut,

as indicated at 173. It will be seen that by manually or by means of themechanism described, the threaded shaft 172 may be turned to raise orlower the side-head. The side-heads 6 and 7 are provided respectivelywith tool-slides 174 and 175. These are'adjusted respectively by meansof transverse screws 178 and 179 which are manually rotatablerespectively by means ofcranks 176 and 17 7.-

It will be understood that for all of the preliminary tool adjustmentswhich have been described, the transfer switch 16 1s maintained in itslower position, the feedmotor 8 being operated 1n one direction or theother as required by manually moving the levers 21 and 22. I

If. for any reason, it is desirable to efiect the traverse of thecross-rail heads manually, this may be accomplished by means of a handwrench slipped onto the squared ends of the respective cross-rail headtraversing screws101, 105. Similarly the tool-slides of 'these heads maybe elevated by hand wrenches applied to the squared ends of the 'thescrew 190 and thus 7 pin 191 outward or inward. Inasmuch as the lever200 is connected with the gear 101,

elevating screws 147 thereof, and the sidw heads as a whole may beelevated. by wrenches applied to the squared ends of the horizontalshafts 165. Preferably the sideheads are provided with suitablecounterweights as at 181, 182 although these'counterweights may bedispensed with.

From the foregoing description it will be clear that by means of themotor 8 any desired preliminary adjustment can be made of the cross-railas a whole, of either or both of the cross heads with respect to thecross-rail, of either or both of the toolslides with respect to thecross heads or of either or both of the side-heads. When the tools havebeen preliminarily adjusted to bring them into proper relationship tothe work to be planed, the parts of the mechanism are then adjusted forfeeding the tools through proper distances at each reciprocation of thetable 2.

When the tools are to be automatically fed by means of the motor, thetransfer switch 16 is thrown to its upper position, thus connecting thefeed-motor to be automatically controlled and started, preferablysimultaneously with the main motor. For feeding one or both of the crossheads transversely or for feeding one or both of the slides 'on thecross heads, the clutch 100 is adjusted to its left-hand position bymeans of the handle 111, thus con necting the gear 101 with the lever200. As already described, the feed-plate or crank arm 97 is secured tothe rotatable shaft 95 and this crank arm is provided with the centrallongitudinal slot 189. Positioned in the slot 189 -is a screw threadedadjusting member 190 terminating in knurled knobs 191, 192 or othersuitable means whereby the screw may be readily rotated to the desiredextent and securely end 199 to the 1 97- is rotated the connecting rod195 will serve to oscillate the lever 200, the extent of oscillationbeing adjustable byturning moving the crank this gear is similarlyoscillated. Inasmuch the electrical connections are so designed as tocause the fecd-motor cut-out 19 to stop the feed-motor after thevertical shafts 65, 70 driven thereby have rotated through a definiteangle, as for instance one-half a revolution, it will be clear that byvirtue of the'unity gear ratio between said vertical shaft 70 andtheintermediate shaft 95, the teed-motor will at the beginning of eachcutting stroke of the planer rotate the crank arm 97 through one-half a.revolution, and will at the beginning of each. return stroke rotate thecrank arm through one-half a revolution in the opposite direction. Fore* h halfu'evolution of the crank arm 97 t a gear 101 will be turnedthrough a definite angle,-the size of the angle being adjustable bymeans of the screw 190 and the nut 193. By virtue of the double-ratchetgears 102, 103 the tools carried on the cross.

rail heads 4, 5 may be moved in one direction at the beginning of onestroke of the planer table, but will remain stationary at the beginningof the other stroke. it will be obvious that the direction of movementof the tools carried by the cross-rail heads may be similar or opposite,or, if only one tool is being used, the latch,- associated With the idlehead 4: or 5, may he moved to neutral position and, the oscillation ofthe large gear 101 will then cause simply the horizontal feed in thedesired direction of the tool carried by the other head. The amplitudeof feed may be adjusted to a high degree of precision by manipulatingthe .knobs 191, 1912 thereby varying the eccentricity of the pin 19a towhich the connecting rod 195 is rotatably secured. If one or the otherof the tools is to be fed upward or downward by meansotf thecorrespondii'ig slide 136 or 137, this is edected by properly adjustingthe click-box on the shaft 138 and by properly positioning the levers142 and 150.

In like manner thefeechplates 161, car ried respectively by the sideheads 6,7, may be utilized. to eii'ect vertical movements of eithen'orboth of the side heads through the driving connections from thefeedmotor, as hereinbefore described.

It will be noted that it a tool is to be fed in one direction, this isdone at, for instance, the beginning of thecutting stroke, while if thetool is to be fed in the opposite direction feeding movement will takeplace at the beginning of the return stroke. In the latter event theobjection may be raised that the tool would drag over the work duringthe return stroke, This dragging action does in fact occur, but itsefiect is not notice ably deleterious except when a finishing cut isbeing made and in such case the tool may I he held away from the workduring the re turn stroke either manually or by known l mechanismcomprising in itself'no part of of its cutting stroke, the pilot-switch20 to the present invention the sequence of events during the cutting 1operations may be summarized as follows Assuming the planer table to beat the end he in its neutral position and the double pole doublethro'wswitch 16 to be thrown upward, the pilot-switch drum 21-" may be rotatedmanually by the levers 21 or 22 to its return position, whereupon boththe main motor 3 and the feed motor 8 will begin to rotate. The rotationof the main motor, accelerated upon the rising of the core-45 of thesecond switch 12, causes the planer table? to carry the work idly pastfor the remainder of the return stroke thev tools are stationary. At1theend of the return stroke the adjustable dog 2 1 on the planer carriageshifts the pilot-switch 20 over to its cutting position, whichaccomplishes two functions: first, the main motor 3 is brought quicklyto a stop and then started in the reverse direction, and, second, thefeed-motor 8 is caused to rotate in a direction opposite to itsdirection of rotation at the beginning of the return stroke; As theplaner table 2 moves 'on'.its cutting stroke and before the work hasreached any of the tools, the rotation of the large gears 101 and 162,in the opposite direction to that indicated above ellects through therespective doubleratchet gears the feeding movement of the tools whichwere not fedat the beginning of the return stroke. As before, thefeedmotor is brought to a stop as soon as the vertical shafts and thefeed plates have completed one-half revolution; so that as the work iscarried past the tools they make the desired width and depth of outthroughof this invention are achieved and the above and other advantagesobtained.

Having described our invention, what we claim as new and desire tosecure by Letters ,Patent is z .2. In a machine of the class described,

. the combination of a vertically movable cross-rail, a tool 'headmovable horizontally on the cross-rail, a power means, and powertransmission mechanism connected with the .power means and comprisingdevices for moving the tool head at a speed which is yfixedly related tothat of the power means andother devices'for moviniq the tool-head .at aspeed which is optionally variable with relation tothe speed of thepower means, the said power transmission means being carried by thecross-rail device and bodily movable therewith.

3. In a machine of the class described, the

-combination, of a movable tool head, a

power, means, and power transn'iission mechanism connected wlth thepower means i and bodily movable vertically, the said "powertransmission mechanism comprising twosets of devices for moving the toolhead,

;the devices of one set being adapted to move the tool headintermittently and the devices ofv the other set being adapted to movethe tool head continuously.

4. Ina machine of the class described, the ccombination of a verticallymovable cross-rail, a tool head movable horizontally on-the cross-rail,a power means. and power transmission mechanism connected ,with thepower meansand carried by the-cross-rail to be bodily movable therewith,the said power transmission mechanism comprising two sets of devices formoving the tool head, the devices of one set being adapted to move thetool head intermittently and the devices of the other set being adaptedto move the tool head continuously. I

5. In a machine of the class described, the combination of'a movabletool head, a power means, and power transmission mechanism between the.power means and the tool head comprising a shaft rotatablewith the power:means, a gear on the shaft for transmitting continuous movement to thetool head, a

f crank arm on the shaft for transmitting intermittentmovementstothe-tool head and 'means" forv causing either the rank arm tobe operative. I

' continuously.-

' 6; 1 In a machine of the class describemthe i 11, In a m'accombination of a movable tool head, a power means, and. powertransmission mechanism between the. power means and the tool headcomprising a shaft rotatablewith the power means, a gear on the shaftfor transmitting continuous moven'ient to the tool head,

adjustable crank a rm on the shaft for transmitting adjustableintermittent movements to the tool head and means for causing either thegear or the crank arm to be operative.

7. In a machine of the class described, tae combination of a movabletool head, a power means, aiid power transmissionmechanism between thepower meansand the tool head comprising a drive gear, a double ratchetdevice between the drive gear and the toolhead, an intermediate gear andlever both movable about the axis ofthedrive gear,

clutch for connecting either the intermediate gear or the lever to thedrive gear, a shaft driven by the power means, a gear on the shaftmeshing with the intermediate geaii and a crank arm on the shaftconnected with the lever to oscillate it.

8. In amachineof the class described the combination "of a movable toolhead, an electric motor, power transmission mechanism connected with themotor and bodily"movable vertically, the said power transmissionmechanism comprising two sets of devices for moving the tool head, thedevices of one set being adapted to move the tool head intermittentlyand the devices of the other set being adapted to move the tool headcontinuously, and means for stopping the motor after rotation to apredetermined extent.

9. In a machine of the class described, the

combination of a vertically movable-crossrail, a tool'head movablehorizontally on the cross-rail, an electric motor power transmission'mechanism connected with the motor and carriedby the cross-rail to bebodily movable therewithifl the said. power trans- "mission mechanismcomprising two setsof devices for moving the tool head, thedevices ofone set being adapted to'move the tool head intermittently and thedevices ofthe other set being-adapted to move the too'lheadcontinuously, and means for stopping the motor after rotation to apredetermined extent. I

10.111 a'machine of the class described, the combination of a verticallymova le crossrail, a cutting tool adjustable rela ively to thecross-rail, a motor, and power transmission'mechanism including meansfor optionally connecting the motor either with the .-cross'rail to moveit vertically or jwiththe tool to moveit', the said mechanism compristhedevices of one s'e t' 'being a'dapted to niove the tool intermittentlyand the devices of the gear or the other set"being *adapted' jto movethe tool n rse enssae i itedah -ling two sets of devices for moving thetool,

combination of a vertically movable cross rail, a cutting tooladjustable relatively to the cross-rail, an electric motor, powertransmission mechanism including means for op tionally connecting themotor-either with the cross-rail to move it vertically or with the toolto move it,the said mechanism comprising two sets of'devices for movingthe tool, the devices of one set being adapted to move the toolintermittently and the devices of the other set being adapted to movethe tool continuously, a switch for automatically stopping themotorafter rotation to a predetermined extent, whereby the tool may bemoved to a predetermined extent, and means for rendering the motorstopping switch ineffective whereby either the cross-rail or the toolmay be moved continuously to--any desired extent.

12. Apparatus of the character described comprising, in combination, amotor, a cross rail, ,a head thereon, means whereby said motor mayeiiect the raising and lowering of the cross-rail as well asthe traverseof the g 13. Apparatus of the character described,

rail, a side-head, means whereby said'motor head, and means actuatedbysai first named means for cutting off the suppl; of.power to said motorat predetermined times.

comprising, in combination, a motor, a crossrail, 9. head thereon, meanswhereby said motor may efiect the raising and lowering of the cross-railas well. as the'traverse of the head, means associated with saidfirstmeans adapted at predetermined times in the .operation of the sameto cut of! the supply of power to said motor, and'means for renderingsaid second means inefie'ctive in order that power may be suppliedcontinuously to 1 said motor.

14. Apparatus of the character, described compris1ng, in combination, amotor, a cross may efl'ect the raising and lowering of the cross-rail asWell as the raising and lowering of the side-head,- and means actuatedby. said first named means for cutting oif the supply of power to saidmotor. at predetermined times.

15. Apparatus of thecharacter described, comprising, in'combination, amotor, a crossrail', a side-head, means whereby said motor may effectthe raising and lowering of the cross-rail as well as the-raisingandlowering of the side-head, means associated with said first meansadapted at predetermined times in the operation of the same to cut ofithe supply of power toisaid motor, and means for rendering said secondmeans ineffective in order that power may be supplied continuously tosaid motor. L

16. Apparatus of the character described, comprismg, in comb natlom'amotor, a cross- 'rail, a. head thereon, a side-head, means whereby saidmotor may effect the elevation.

of said cross-rail, the traverse of said crossdevice ineffective wherebythe motor rail head and the elevation oflsaid-gsidehead, and meansassociated with said first means adapted at predetermined times in theoperation of the same to cut oil the supply of power to said motor.

17. Apparatus of the character described, compr1s1ng,1n combination, amotor, a crossrail, a head thereon, a side-head, means whereby saidmotor effects the elevation of and ,the tool, of a tool feeding motor, adevice normally operated by the table to start the motor at regularintervals asthe table reeiprocates, a motor operated device normallyserving to stop the motor after movement toa predetermined extent, and adevice independent of the said table operated device adapted to renderthe motorstopping is controllable entirely independently thereof.

19. In a planer vor other machine having aregularly reciprocating table,a vertically movable cross-rail and a tool adjustable relatively to thecross-rail, the combination with the.table,'the cross-rail and the tool,of a motor, means foroptionally connecting the motor either with thecross-rail to move it vertically. or with the tool to adjust it, a

device normally operated bythe table to start'the motor at regularintervals as the table reclprocates, a motor operated devicenormallyserving to stop the motor after movement to a predeterminedextent, and a device adapted to render 'the motor stopping deviceinefi'ectivewhereby themotor is con trollable entirely independentlythereof.

20. Ina planer or other machine having a re ula-rly reciprocatingtableand' an adjusta le tool, the combination 'with the table and thetool, of a'tool feeding motor, a device normally operated by the tableto start the motor alternatelyin opposite directions.

at regular intervals as the tablereciprocates, a motor operateddevicenormally serving to stop the motor after ,movement to a pre- 120determined extent, and a device adapted to I render the motor stoppingdevice ineffective whereby the motor is controllable entirelyindependently thereof. 1 t 21 In a planer. or other machine having aregularly reciprocating table and an ad'- j11stable' tool, thecombinationwith the table and the tool, of a tool feeding motor, a con-

